Abstract
In this paper we report studies of the luminescence from photoexcited poly(p-phenylene vinylene) [PPV]. A strong decrease in the yield and lifetime is observed as the extent of unsaturation is increased by thermal conversion from the precursor to fully converted PPV. Such behaviour can be explained by non-radiative recombination processes that compete with the luminescence and which become increasingly efficient as the conjugation length increases. The non-radiative decay is separated into monomolecular and bimolecular components both of which are seen to increase with conjugation length; with the latter of greater relative importance for the more highly converted samples. The monomolecular component appears consistent with recent theoretical treatments whilst the origin of the bimolecular component is at present unclear.KeywordsCharge SeparationThermal ConversionConjugation LengthExcitation DensityLuminescence EmissionThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call